Improvement in spring-hinges



UNITED STATEs PATENT GFFICE.

LORENZVBOMMER, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN SPRING-HINGES.

Specification forming part of Letters Patent No. 184,058, dated November7, 1876; application led October 14, 1876.

To all whom it may concern: A

Be it known that I, LORENZ BOMMER, of Brooklyn, in the county of Kingsand State of New York, have invented a new and Improved Spring`Butt-Hinge, of which the following is a specification:

In the accompanying drawing, Figure l represents afrontelevation ot' myimproved spring butt-hinge, partly in section; Fig.2, a horizontalsectionot' the same on line x x, Fig'. l; and Figs. 3 and 4 are,respectively, side and top views of Ithe upper and lower pintle-sockets.

Similar letters of reference indicate corresponding parts.

The object ot' my invention is to Ifurnish an improved spring butt-hingewhich closes the door in an easy and noiseless manner, producing reducedfriction on the faces ot' the seats, and being cheap, strong, andeffective.

The invention consists in the construction and arrangement of partswhich will be hereinafter' more fully described, and then pointed out inthe claims.

In the drawing, A are the ilanges or Wings of a butt-hinge, which areconnected by a center pintle, B, passing through perforations of theseats B of the flanges, and being riveted to the end buttons Al at thetop and bottom of the hinge. The buttons A are not made detachable, tobe separately' applied to the hinge-seats, but cast in one piece withthe seats of the swinging flange A applied to the door. This dispenseswith the separate casting, finishing, and attaching of the buttons, andimparts, by the greater bearingsurface on the pintle, a more rigidconnection with less friction on the faces or bearings of the seats. Thehinge is provided with an interior spiral spring, C, that is secured atone end into a slot or recess, a, of a socket, b, cast with the lowerseat B of the flange A, attached stationary to the door-casing. Theupper end of spiral spring O is secured to a similar recess, a', of adetachable pintle-socket, b, which turns on the pintle during theopening and closing of the door. The tension ot' the spring C isadjusted in the customary manner by introducing'a small rod into one otthe radial holes ot the movable socket b', and turning the same,inserting a small pin into the hole nearest to a raised part of theswinging doorflange. The iiange of the door bears then, in opening,against the pin, twisting thereby the spring, and closes the door `bythe reaction of the same. The spiral spring C is inclosed by acylindrical sleeve, D, that is accurately ltted to annular recesses b2of the movable pintlesocket bl and ot' the fixed socket b of the seat ofthe stationary flange A. The sleeve D is open at the side and providedwith side ilanges d that extend into recesses at both sides of thestationary flange being riveted ilush with the same. The sleeve D servesto strengthen the flanges A, secures the position ot' the movable socketb', and incloses and keeps out the dust from the interior ot' the hinge.

The spring butt-hinge ot' this construction is cheaper, stronger, andless liable to friction and sagging of the door than similar butthingesheretofore patented.

The butt-hinge may be applied to any side 4

